/*  Copyright (c) 2000-2006 hamcrest.org
 */
package org.hamcrest.core;

import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
import org.hamcrest.Factory;
import org.hamcrest.Matcher;

/**
 * Is the value the same object as another value?
 */
public class IsSame<T> extends BaseMatcher<T> {
	private final T object;

	public IsSame(T object) {
		this.object = object;
	}

	@Override
	public boolean matches(Object arg) {
		return arg == object;
	}

	@Override
	public void describeTo(Description description) {
		description.appendText("same(").appendValue(object).appendText(")");
	}

	/**
	 * Creates a new instance of IsSame
	 *
	 * @param object The predicate evaluates to true only when the argument is
	 *               this object.
	 */
	@Factory
	public static <T> Matcher<T> sameInstance(T object) {
		return new IsSame<T>(object);
	}

}
